Remove getSpeculativeText since getText works again

runtime/Java/src/org/antlr/v4/runtime/Lexer.java

@@ -315,13 +315,6 @@ public abstract class Lexer extends Recognizer<Integer, LexerATNSimulator>
 		return getInterpreter().getText(_input);
 	}
 
-	/** Get the text from start of token to current lookahead char.
-	 *  Use this in predicates to test text matched so far in a lexer rule.
-	 */
-	public String getSpeculativeText() {
-		return getInterpreter().getSpeculativeText(_input);
-	}
-
 	/** Set the complete text of this token; it wipes any previous
 	 *  changes to the text.
 	 */

runtime/Java/src/org/antlr/v4/runtime/atn/LexerATNSimulator.java

@@ -698,15 +698,6 @@ public class LexerATNSimulator extends ATNSimulator {
 		return input.getText(Interval.of(startIndex, input.index()-1));
 	}
 
-	/** Get the text from start of token to current lookahead char.
-	 *  Use this in predicates to test text matched so far in a lexer rule.
-	 */
-	@NotNull
-	public String getSpeculativeText(@NotNull CharStream input) {
-		// index is first lookahead char, don't include.
-		return input.getText(Interval.of(startIndex, input.index()));
-	}
-
 	public int getLine() {
 		return line;
 	}

tool/test/org/antlr/v4/test/TestLexerExec.java

@@ -267,9 +267,6 @@ public class TestLexerExec extends BaseTest {
 	}
 
 	@Test public void testLexerInputPositionSensitivePredicates() throws Exception {
-		// The predicates here make sense on the left edge, but are currently
-		// only working on the right edge... resolving this would remove the
-		// need for Lexer.getSpeculativeText as well.
 		String grammar =
 			"lexer grammar L;\n"+
 			"WORD1 : ID1+ {System.out.println(getText());} ;\n"+

tool/test/org/antlr/v4/test/TestSemPredEvalLexer.java

@@ -67,7 +67,7 @@ public class TestSemPredEvalLexer extends BaseTest {
 	@Test public void testEnumNotID() throws Exception {
 		String grammar =
 			"lexer grammar L;\n"+
-			"ENUM : [a-z]+ {getSpeculativeText().equals(\"enum\")}? ;\n" +
+			"ENUM : [a-z]+ {getText().equals(\"enum\")}? ;\n" +
 			"ID   : [a-z]+ ;\n"+
 			"WS : (' '|'\\n') {skip();} ;";
 		String found = execLexer("L.g4", grammar, "L", "enum abc enum", true);