gradle: Remove jcenter usage, it was shut down.

dd1fa85f · Ryan Pavlik · bdc53b97 · dd1fa85f
Commit dd1fa85f authored May 05, 2021 by Ryan Pavlik
--- a/build.gradle
+++ b/build.gradle
@@ -19,7 +19,6 @@ buildscript {
    }
    repositories {
        google()
-        jcenter()
        mavenCentral()
    }
    dependencies {
@@ -59,6 +58,6 @@ ext {
 allprojects {
    repositories {
        google()
-        jcenter()
+        mavenCentral()
    }
 }