Remove unused code from AssetManager

Signed-off-by: Paolo Di Tommaso <paolo.ditommaso@gmail.com>

modules/nextflow/src/main/groovy/nextflow/scm/AssetManager.groovy

@@ -242,6 +242,7 @@ class AssetManager {
      * @param name A project name or URL e.g. {@code cbcrg/foo} or {@code https://github.com/cbcrg/foo.git}
      * @return The fully qualified project name e.g. {@code cbcrg/foo}
      */
+    @PackageScope
     String resolveName( String name ) {
         assert name
 
@@ -362,11 +363,6 @@ class AssetManager {
         return this
     }
 
-    AssetManager setForce( boolean value ) {
-        this.force = value
-        return this
-    }
-
     AssetManager checkValidRemoteRepo(String revision=null) {
         // Configure the git provider to use the required revision as source for all needed remote resources:
         // - config if present in repo (nextflow.config by default)