Move to Maven Central for flipper deps

Summary:
Changelog: [Internal]

Flipper moved to maven central recently, so we can remove exceptions for it.

Reviewed By: fkgozali

Differential Revision: D26915353

fbshipit-source-id: c245e25ecb0eef1e279f197c2717673ec9ce3ca1

Author: Andrei Shikov

build.gradle.kts

@@ -41,9 +41,6 @@ allprojects {
         jcenter {
           content {
             includeModule("org.jetbrains.trove4j", "trove4j")
-            includeModule("com.facebook.flipper", "flipper-network-plugin")
-            includeModule("com.facebook.flipper", "flipper")
-            includeModule("com.facebook.flipper", "flipper-fresco-plugin")
             includeModule("com.facebook.yoga", "proguard-annotations")
             includeModule("com.facebook.fbjni", "fbjni-java-only")
             includeModule("com.facebook.fresco", "stetho")