Revert "Pause an MJIT worker when JIT is cancelled"

This reverts commit b64f81c817.

It seems to cause a problem in --jit / --jit-wait CIs. Reverting for now.

NEWS.md

@@ -182,8 +182,6 @@ Excluding feature bug fixes.
 * `--jit-verbose` and `--jit-warning` output "JIT cancel" when JIT-ed
   code is disabled because TracePoint or GC.compact is used.
 
-* Pause an MJIT worker when JIT-ed code gets disabled.
-
 * `RubyVM::MJIT` is renamed to `RubyVM::JIT`. [[Feature #17490]]
 
 ## Static analysis

mjit.c

@@ -94,9 +94,6 @@ mjit_cancel_all(const char *reason)
     if (mjit_opts.warnings || mjit_opts.verbose) {
         fprintf(stderr, "JIT cancel: Disabled JIT-ed code because %s\n", reason);
     }
-
-    // Currently we never re-enable JIT calls. Thus we don't need to run JIT anymore.
-    mjit_pause(false);
 }
 
 // Deal with ISeq movement from compactor