Fix PHPCS error

FILE: ...kti.kumar/work/d8/web/modules/system_status/system_status.module
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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 28 | WARNING | Code after RETURN statement cannot be executed
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FILE: ...umar/work/d8/web/modules/system_status/system_status.routing.yml
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FOUND 1 ERROR AFFECTING 1 LINE
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 14 | ERROR | [x] Expected 1 newline at end of file; 2 found
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: ...i.kumar/work/d8/web/modules/system_status/system_status.info.yml
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FOUND 1 ERROR AFFECTING 1 LINE
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 6 | ERROR | [x] Expected 1 newline at end of file; 2 found
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: /Users/shakti.kumar/work/d8/web/modules/system_status/README.txt
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FOUND 0 ERRORS AND 6 WARNINGS AFFECTING 6 LINES
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 50 | WARNING | Line exceeds 80 characters; contains 85 characters
 55 | WARNING | Line exceeds 80 characters; contains 86 characters
 56 | WARNING | Line exceeds 80 characters; contains 84 characters
 64 | WARNING | Line exceeds 80 characters; contains 87 characters
 68 | WARNING | Line exceeds 80 characters; contains 88 characters
 69 | WARNING | Line exceeds 80 characters; contains 89 characters
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FILE: ...mar/work/d8/web/modules/system_status/system_status.services.yml
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FOUND 1 ERROR AFFECTING 1 LINE
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 3 | ERROR | [x] Expected 1 newline at end of file; 0 found
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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Time: 249ms; Memory: 8Mb