Revert "Add an updated gradle plugin to compile on Java 17. (bumptech…

…#5185)"

This reverts commit 928c8dc.

.github/workflows/build.yml

@@ -12,7 +12,7 @@ jobs:
           - uses: actions/checkout@v3
           - uses: actions/setup-java@v3
             with:
-              java-version: '17'
+              java-version: '11'
               distribution: 'zulu'
           - uses: gradle/gradle-build-action@v2
           - name: Build and run unit tests with Gradle

build.gradle

@@ -20,7 +20,6 @@ buildscript {
         classpath libs.ksp.gradle
         classpath libs.coroutines.binarycompat.gradle
         classpath libs.dokka.gradle
-        classpath 'com.guardsquare:proguard-gradle:' + (JavaVersion.current().isCompatibleWith(JavaVersion.VERSION_11) ? '7.3.2' : '7.1.0')
     }
 }