Remove unneeded jitpack repo from Gradle config (#123)

build.gradle.kts

@@ -4,7 +4,6 @@ buildscript {
     repositories {
         google()
         mavenCentral()
-        maven { url = java.net.URI("https://jitpack.io") }
     }
     dependencies {
         classpath("com.android.tools.build:gradle:4.2.1")
@@ -20,7 +19,6 @@ allprojects {
     repositories {
         google()
         mavenCentral()
-        maven { url = java.net.URI("https://jitpack.io") }
     }
 }