Removed redundant conditional

The current block it was in already guarantees `callback` is truthy so it was frivolous.
Merge pull request #9299 from jayphelps/patch-4

Removed redundant conditional
Streamify template bindings
[DOC] Change 'the the' to 'the'
Merge pull request #9303 from mikepmunroe/doc-fix-setObjects

[DOC] Change 'the the' to 'the'
[BUGFIX beta] Fix substates for nested routes and auto-generated index routes

Including refactoring to avoid duplication which felt responsible for the initial error.
Warn if FEATURES flagging is used in non-canary, debug builds. Fixes #9302
Merge pull request #9309 from jayphelps/warn-features-non-canary

Warn if FEATURES flagging is used in non-canary, debug build. Fixes #9302
Merge pull request #9308 from BookingSync/fix-substates

[BUGFIX beta] Fix substates for nested routes and auto-generated index routes
[BUGFIX] Exclude isEnabled as a possible FEATURES key for warnings
[BUGFIX beta] Do not test property accessors when not available.
Merge pull request #9314 from rwjblue/no-accessors-on-ie8

[BUGFIX beta] Do not test property accessors when not available.
Merge pull request #5522 from mmun/handlebars-streams

Streamify template bindings
[BUGFIX] #9309 needed to include the mock FEATURES flag in the features.json so it isn't stripped in canary
Merge pull request #9311 from jayphelps/oops

[BUGFIX] Canary FEATURES flagging shouldn't produce warnings in canary
SimpleBinding should relay setValue
Merge pull request #9318 from mmun/simple-stream-setvalue

SimpleBinding should relay setValue
Failing test for {{view class=someBoundProp}}.
Ensure that {{view class=someProp}} is not streamified early.
View name resolution regression tests

Issue #5579