rm unneeded class

runtime/Java/src/org/antlr/v4/runtime/tree/pattern/RuleSubtreeNode.java

@@ -1,20 +0,0 @@
-package org.antlr.v4.runtime.tree.pattern;
-
-import org.antlr.v4.runtime.ParserRuleContext;
-
-public class RuleSubtreeNode extends ParserRuleContext {
-	RuleTagToken ruleTagToken;
-
-	public RuleSubtreeNode(ParserRuleContext ctx) {
-		copyFrom(ctx);
-		this.ruleTagToken = (RuleTagToken)ctx.start; // first (and only) token is the <ruletag>
-	}
-
-	@Override
-	public String getText() {
-		return ruleTagToken.getText();
-	}
-
-	@Override
-	public int getRuleIndex() { return ruleTagToken.ruleIndex; }
-}