Remove dependency lookup from cloud bucket

This bucket was used to guarantee access to dependencies when we
depended on unstable maven repositories

None of the current dependencies are likely cached here

Dependency resolution is much slower when you have a custom dependency
lookup like this (~10 seconds compared to <1)

Bug: 270021542
Change-Id: I5f185c518a2c9d75b1f633fa5922a1380fb11e75
diff --git a/build.gradle b/build.gradle
index b1d49c3..c3cdf5c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -16,9 +16,6 @@
 
 buildscript {
     repositories {
-        maven {
-            url 'https://storage.googleapis.com/r8-deps/maven_mirror/'
-        }
         mavenCentral()
         gradlePluginPortal()
         jcenter()
@@ -52,9 +49,6 @@
 }
 
 repositories {
-    maven {
-       url 'https://storage.googleapis.com/r8-deps/maven_mirror/'
-    }
     google()
     mavenCentral()
 }