Revert "Don't call action-slack if SLACK_WEBHOOK_URL is not set"

This reverts commit 223a79e683.

.github/workflows/annocheck.yml

@@ -154,7 +154,7 @@ jobs:
             }
         env:
           SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
-        if: ${{ failure() && github.event_name == 'push' && secrets.SIMPLER_ALERTS_URL }}
+        if: ${{ failure() && github.event_name == 'push' }}
 
 defaults:
   run:

.github/workflows/baseruby.yml

@@ -75,4 +75,4 @@ jobs:
             }
         env:
           SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
-        if: ${{ failure() && github.event_name == 'push' && secrets.SIMPLER_ALERTS_URL }}
+        if: ${{ failure() && github.event_name == 'push' }}

.github/workflows/bundled_gems.yml

@@ -135,4 +135,4 @@ jobs:
             }
         env:
           SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
-        if: ${{ failure() && github.event_name == 'push' && secrets.SIMPLER_ALERTS_URL }}
+        if: ${{ failure() && github.event_name == 'push' }}

.github/workflows/check_dependencies.yml

@@ -76,4 +76,4 @@ jobs:
             }
         env:
           SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
-        if: ${{ failure() && github.event_name == 'push' && secrets.SIMPLER_ALERTS_URL }}
+        if: ${{ failure() && github.event_name == 'push' }}

.github/workflows/check_misc.yml

@@ -109,4 +109,4 @@ jobs:
             }
         env:
           SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
-        if: ${{ failure() && github.event_name == 'push' && secrets.SIMPLER_ALERTS_URL }}
+        if: ${{ failure() && github.event_name == 'push' }}

.github/workflows/compilers.yml

@@ -279,7 +279,7 @@ jobs:
             }
         env:
           SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
-        if: ${{ failure() && github.event_name == 'push' && secrets.SIMPLER_ALERTS_URL }}
+        if: ${{ failure() && github.event_name == 'push' }}
 
 defaults:
   run:

.github/workflows/macos.yml

@@ -108,7 +108,7 @@ jobs:
             }
         env:
           SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
-        if: ${{ failure() && github.event_name == 'push' && secrets.SIMPLER_ALERTS_URL }}
+        if: ${{ failure() && github.event_name == 'push' }}
 
 defaults:
   run:

.github/workflows/mingw.yml

@@ -171,7 +171,7 @@ jobs:
             }
         env:
           SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
-        if: ${{ failure() && github.event_name == 'push' && secrets.SIMPLER_ALERTS_URL }}
+        if: ${{ failure() && github.event_name == 'push' }}
 
 defaults:
   run:

.github/workflows/rjit-bindgen.yml

@@ -97,7 +97,7 @@ jobs:
             }
         env:
           SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
-        if: ${{ failure() && github.event_name == 'push' && secrets.SIMPLER_ALERTS_URL }}
+        if: ${{ failure() && github.event_name == 'push' }}
 
 defaults:
   run:

.github/workflows/rjit.yml

@@ -127,7 +127,7 @@ jobs:
             }
         env:
           SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
-        if: ${{ failure() && github.event_name == 'push' && secrets.SIMPLER_ALERTS_URL }}
+        if: ${{ failure() && github.event_name == 'push' }}
 
 defaults:
   run:

.github/workflows/spec_guards.yml

@@ -58,4 +58,4 @@ jobs:
             }
         env:
           SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
-        if: ${{ failure() && github.event_name == 'push' && secrets.SIMPLER_ALERTS_URL }}
+        if: ${{ failure() && github.event_name == 'push' }}

.github/workflows/ubuntu.yml

@@ -137,7 +137,7 @@ jobs:
             }
         env:
           SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
-        if: ${{ failure() && github.event_name == 'push' && secrets.SIMPLER_ALERTS_URL }}
+        if: ${{ failure() && github.event_name == 'push' }}
 
 defaults:
   run:

.github/workflows/wasm.yml

@@ -127,7 +127,7 @@ jobs:
             }
         env:
           SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
-        if: ${{ failure() && github.event_name == 'push' && secrets.SIMPLER_ALERTS_URL }}
+        if: ${{ failure() && github.event_name == 'push' }}
 
 defaults:
   run:

.github/workflows/windows.yml

@@ -149,7 +149,7 @@ jobs:
             }
         env:
           SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
-        if: ${{ failure() && github.event_name == 'push' && secrets.SIMPLER_ALERTS_URL }}
+        if: ${{ failure() && github.event_name == 'push' }}
 
 defaults:
   run:

.github/workflows/yjit-ubuntu.yml

@@ -170,7 +170,7 @@ jobs:
             }
         env:
           SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
-        if: ${{ failure() && github.event_name == 'push' && secrets.SIMPLER_ALERTS_URL }}
+        if: ${{ failure() && github.event_name == 'push' }}
 
 defaults:
   run: