Bug 1475256 - Remove top-level 'apply plugin: jacoco' from android configurations. r=nalexander

It appears that we don't actually need to load this plugin, since we're not
doing any JaCoCo-related operations on the build machine (like generating
reports). This has been left over since I integrated code coverage to gv-junit.

Depends on D4144

Differential Revision: https://phabricator.services.mozilla.com/D4145

--HG--
extra : moz-landing-system : lando

mobile/android/app/build.gradle

@@ -532,11 +532,6 @@ if (project.hasProperty('enable_code_coverage')) {
 
 // Set up code coverage for tests on emulators.
 if (mozconfig.substs.MOZ_JAVA_CODE_COVERAGE) {
-    apply plugin: "jacoco"
-    jacoco {
-        toolVersion = "${project.jacoco_version}"
-    }
-
     android {
         jacoco {
             version = "$jacoco_version"

mobile/android/geckoview/build.gradle

@@ -395,11 +395,6 @@ if (project.hasProperty('enable_code_coverage')) {
 
 // Set up code coverage for tests on emulators.
 if (mozconfig.substs.MOZ_JAVA_CODE_COVERAGE) {
-    apply plugin: "jacoco"
-    jacoco {
-        toolVersion = "${project.jacoco_version}"
-    }
-
     android {
         jacoco {
             version = "$jacoco_version"