Revert "JS: Add support for Closure modules"

javascript/extractor/tests/html/output/trap/module.html.trap

@@ -104,7 +104,6 @@ scopes(#20035,3)
 scopenodes(#20001,#20035)
 scopenesting(#20035,#20000)
 isModule(#20001)
-isES2015Module(#20001)
 #20036=@"var;{foo};{#20035}"
 variables(#20036,"foo",#20035)
 #20037=@"local_type_name;{foo};{#20035}"

javascript/extractor/tests/html/output/trap/tst2.html.trap

@@ -175,7 +175,6 @@ scopes(#20053,3)
 scopenodes(#20037,#20053)
 scopenesting(#20053,#20000)
 isModule(#20037)
-isES2015Module(#20037)
 #20054=@"var;{inAModule};{#20053}"
 variables(#20054,"inAModule",#20053)
 #20055=*
@@ -260,7 +259,6 @@ scopes(#20079,3)
 scopenodes(#20061,#20079)
 scopenesting(#20079,#20000)
 isModule(#20061)
-isES2015Module(#20061)
 #20080=@"var;{f};{#20079}"
 variables(#20080,"f",#20079)
 #20081=@"local_type_name;{f};{#20079}"