[fuzzer] Remove wasm_call_fuzzer

The wasm call fuzzer is superseded by the wasm compile fuzzer, thus
remove it.

R=ahaas@chromium.org

Change-Id: I732a3d2ca81a1642e862f2cf374e4adaf51e8f07
Reviewed-on: https://chromium-review.googlesource.com/895531
Commit-Queue: Abhishek Arya <inferno@chromium.org>
Reviewed-by: Abhishek Arya <inferno@chromium.org>
Cr-Commit-Position: refs/heads/master@{#533282}

testing/libfuzzer/fuzzers/BUILD.gn

@@ -243,14 +243,6 @@ fuzzer_test("v8_wasm_compile_fuzzer") {
   libfuzzer_options = [ "max_len=500" ]
 }
 
-fuzzer_test("v8_wasm_call_fuzzer") {
-  sources = []
-  deps = [
-    "//v8:wasm_call_fuzzer",
-  ]
-  libfuzzer_options = [ "max_len=500" ]
-}
-
 fuzzer_test("v8_wasm_fuzzer") {
   sources = []
   deps = [