[test] Remove test exception, test has been removed.

The test has already been removed in
https://codereview.chromium.org/2226053002/.

NOTRY=true
R=machenbach@chromium.org, bradnelson@chromium.org

Review-Url: https://codereview.chromium.org/2229713002
Cr-Commit-Position: refs/heads/master@{#38463}

test/mjsunit/mjsunit.status

@@ -169,9 +169,6 @@
   'wasm/asm-wasm-copy': [PASS, ['arch in [arm, arm64, mips, mipsel, mips64, mips64el]', SKIP]],
   'wasm/asm-wasm-deopt': [PASS, ['arch in [arm, arm64, mips, mipsel, mips64, mips64el]', SKIP]],
   'wasm/asm-wasm-switch': [PASS, ['arch in [arm, arm64, mips, mipsel, mips64, mips64el]', SKIP]],
-  # TODO(ahaas): test disabled until we figure out how runtime calls from wasm
-  # work.
-  'wasm/jit-single-function' : [SKIP],
 
   # case-insensitive unicode regexp relies on case mapping provided by ICU.
   'es6/unicode-regexp-ignore-case': [PASS, ['no_i18n == True', FAIL]],