remove flaky bench-fast-api (#4539)

Author: anonrig

src/workerd/tests/BUILD.bazel

@@ -81,12 +81,6 @@ wd_cc_benchmark(
     ],
 )
 
-wd_cc_benchmark(
-    name = "bench-fast-api",
-    srcs = ["bench-fast-api.c++"],
-    deps = ["//src/workerd/jsg"],
-)
-
 wd_cc_benchmark(
     name = "bench-util",
     srcs = ["bench-util.c++"],
@@ -106,7 +100,6 @@ filegroup(
     name = "all_benchmarks",
     srcs = [
         ":bench-api-headers",
-        ":bench-fast-api",
         ":bench-global-scope",
         ":bench-json",
         ":bench-kj-headers",