move private key to local.properties

Author: CliffLeopard

gradle.properties

@@ -1,10 +1,5 @@
 android.useAndroidX=true
 android.enableJetifier=true
 kotlin.code.style=official
-gradle.publish.key=428PgZpFiKNzKEB4KA3Tv7u8BCmK9inM
-gradle.publish.secret=TRkoaEavLiArtOQ1dQSb7vOimZkyuvLM
-signing.keyId=E91231E1
-signing.password=longya3xian
-signing.secretKeyRingFile=/Users/cliffleopard/.gnupg/secring.gpg
 SDK_PUBLISH=true
 SHOW_DEMOS=false