[recipes] Remove wasm_llvm config

The config was only used in a recipe removed here:
https://crrev.com/c/2814607

Bug: v8:11622
Change-Id: Ie22e26ca0b833afc27459de370ff7a918ad89c29
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2814739Reviewed-by: Derek Schuff <dschuff@chromium.org>
Reviewed-by: Andrii Shyshkalov <tandrii@google.com>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>

recipes/README.recipes.md

@@ -1008,7 +1008,7 @@ Raises:
 
 [DEPS](/recipes/recipe_modules/gclient/examples/full.py#5): [gclient](#recipe_modules-gclient), [recipe\_engine/buildbucket][recipe_engine/recipe_modules/buildbucket], [recipe\_engine/context][recipe_engine/recipe_modules/context], [recipe\_engine/path][recipe_engine/recipe_modules/path], [recipe\_engine/properties][recipe_engine/recipe_modules/properties], [recipe\_engine/step][recipe_engine/recipe_modules/step]
 
-— **def [RunSteps](/recipes/recipe_modules/gclient/examples/full.py#55)(api):**
+— **def [RunSteps](/recipes/recipe_modules/gclient/examples/full.py#54)(api):**
 ### *recipes* / [gclient:tests/diff\_deps](/recipes/recipe_modules/gclient/tests/diff_deps.py)
 
 [DEPS](/recipes/recipe_modules/gclient/tests/diff_deps.py#7): [gclient](#recipe_modules-gclient), [recipe\_engine/assertions][recipe_engine/recipe_modules/assertions], [recipe\_engine/buildbucket][recipe_engine/recipe_modules/buildbucket], [recipe\_engine/path][recipe_engine/recipe_modules/path], [recipe\_engine/platform][recipe_engine/recipe_modules/platform], [recipe\_engine/properties][recipe_engine/recipe_modules/properties], [recipe\_engine/raw\_io][recipe_engine/recipe_modules/raw_io]

recipes/recipe_modules/gclient/config.py

@@ -140,16 +140,6 @@ def webports(c):
   m = c.got_revision_mapping
   m['src'] = 'got_revision'
 
-@config_ctx()
-def wasm_llvm(c):
-  s = c.solutions.add()
-  s.name = 'src'
-  s.url = ChromiumGitURL(
-      c, 'external', 'github.com', 'WebAssembly', 'waterfall.git')
-  m = c.got_revision_mapping
-  m['src'] = 'got_waterfall_revision'
-  c.revisions['src'] = 'origin/master'
-
 @config_ctx()
 def emscripten_releases(c):
   s = c.solutions.add()

recipes/recipe_modules/gclient/examples/full.py

@@ -45,7 +45,6 @@ TEST_CONFIGS = [
   'recipes_py_bare',
   'slave_deps',
   'tint',
-  'wasm_llvm',
   'webports',
   'with_branch_heads',
   'with_tags',