undoing the meaningless "fix"

it was trying to "reduce the number of Maven Central calls"

Author: andrus

cayenne-gradle-plugin/build.gradle

@@ -17,10 +17,6 @@
  *  under the License.
  ****************************************************************/
 buildscript {
-    repositories {
-        mavenLocal()
-        mavenCentral()
-    }
     dependencies {
         classpath 'org.apache.velocity:velocity-engine-core:2.4.1'
     }