minor #17480 Static code analysis (Koc)

This PR was merged into the 2.3 branch.

Discussion
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Static code analysis

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

Things that done:
* fix case in method calls
* removed unused imports
* use shorter concat where it possible
* optimize some css
* removed duplicated array keys
* removed redurant return statements
* removed one-time variables
* do not pass arguments that not used in functions

Commits
-------

8db691a Static code analysis

Author: fabpot

Tests/InlineTest.php

@@ -255,7 +255,6 @@ protected function getTestsForDump()
             '12.30e+02' => 12.30e+02,
             '1234' => 0x4D2,
             '1243' => 02333,
-            '.Inf' => -log(0),
             '-.Inf' => log(0),
             "'686e444'" => '686e444',
             '.Inf' => 646e444,