minor #29761 [PHPUnitBridge][TestSuite] Do not risk waiting 100 seconds (greg0ire)

This PR was merged into the 4.2 branch.

Discussion
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[PHPUnitBridge][TestSuite] Do not risk waiting 100 seconds

| Q             | A
| ------------- | ---
| Branch?       | 4.2
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | nofiles -->
| Tests pass?   | yes, a bit more often
| Fixed tickets | not entirely fixing it
| License       | MIT
| Doc PR        | n/a

It this happens, and it happens, this will make the build quite slow.
Refs #29760

Commits
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9f45af4a2b Do not risk waiting 100 seconds

src/Symfony/Component/Process/Tests/KillableProcessWithOutput.php

@@ -14,7 +14,6 @@ $outputs = array(
     'Second iteration output',
     'One more iteration output',
     'This took more time',
-    'This one was sooooo slow',
 );
 
 $iterationTime = 10000;