Remove disabled-by-default ParameterNotNullable check

Fixes #1044

PiperOrigin-RevId: 351077512

Author: cushon

core/src/main/java/com/google/errorprone/bugpatterns/nullness/NullnessFixes.java

@@ -448,7 +448,6 @@
 import com.google.errorprone.bugpatterns.javadoc.UnescapedEntity;
 import com.google.errorprone.bugpatterns.javadoc.UrlInSee;
 import com.google.errorprone.bugpatterns.nullness.EqualsBrokenForNull;
-import com.google.errorprone.bugpatterns.nullness.ParameterNotNullable;
 import com.google.errorprone.bugpatterns.nullness.UnnecessaryCheckNotNull;
 import com.google.errorprone.bugpatterns.overloading.InconsistentOverloads;
 import com.google.errorprone.bugpatterns.threadsafety.DoubleCheckedLocking;
@@ -987,7 +986,6 @@ public static ScannerSupplier errorChecks() {
           NumericEquality.class,
           PackageLocation.class,
           ParameterComment.class,
-          ParameterNotNullable.class,
           PreferJavaTimeOverload.class,
           PrimitiveArrayPassedToVarargsMethod.class,
           PrivateConstructorForNoninstantiableModule.class,