[Build] Gradle v7.0

build.gradle

@@ -2,7 +2,6 @@ allprojects {
     group 'imgui-java'
     version property('version')
     repositories {
-        jcenter()
         mavenCentral()
     }
 }

buildSrc/build.gradle

@@ -3,7 +3,6 @@ plugins {
 }
 
 repositories {
-    jcenter()
     mavenCentral()
 }
 

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.8.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.0-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists