Remove usages of CaliperMain from java_benchmarks targets since the d…

…eps for java_benchmarks don't need to (and shouldn't) include CaliperMain anymore.

Such benchmarks should be run via the java_benchmarks generated binary directly.

GITHUB_BREAKING_CHANGES=n/a
RELNOTES=n/a

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=196848071

android/guava-tests/benchmark/com/google/common/base/WhitespaceMatcherBenchmark.java

@@ -19,7 +19,6 @@
 import com.google.caliper.BeforeExperiment;
 import com.google.caliper.Benchmark;
 import com.google.caliper.Param;
-import com.google.caliper.runner.CaliperMain;
 import java.util.BitSet;
 import java.util.Random;
 
@@ -51,10 +50,6 @@ public boolean matches(char c) {
   private String teststring;
   private CharMatcher matcher;
 
-  public static void main(String[] args) throws Exception {
-    CaliperMain.main(WhitespaceMatcherBenchmark.class, new String[] {});
-  }
-
   @BeforeExperiment
   protected void setUp() {
     BitSet bitSet = new BitSet();

guava-tests/benchmark/com/google/common/base/WhitespaceMatcherBenchmark.java

@@ -19,7 +19,6 @@
 import com.google.caliper.BeforeExperiment;
 import com.google.caliper.Benchmark;
 import com.google.caliper.Param;
-import com.google.caliper.runner.CaliperMain;
 import java.util.BitSet;
 import java.util.Random;
 
@@ -51,10 +50,6 @@ public boolean matches(char c) {
   private String teststring;
   private CharMatcher matcher;
 
-  public static void main(String[] args) throws Exception {
-    CaliperMain.main(WhitespaceMatcherBenchmark.class, new String[] {});
-  }
-
   @BeforeExperiment
   protected void setUp() {
     BitSet bitSet = new BitSet();