Remove superfluous null checks

Author: sebastianbergmann

src/Report/Clover.php

@@ -88,7 +88,7 @@ public function process(CodeCoverage $coverage, ?string $target = null, ?string
                     $methodCount = 0;
 
                     foreach (range($method['startLine'], $method['endLine']) as $line) {
-                        if (isset($coverageData[$line]) && ($coverageData[$line] !== null)) {
+                        if (isset($coverageData[$line])) {
                             $methodCount = max($methodCount, count($coverageData[$line]));
                         }
                     }

src/Report/Cobertura.php

@@ -174,7 +174,7 @@ public function process(CodeCoverage $coverage, ?string $target = null): string
                     $methodElement->appendChild($methodLinesElement);
 
                     foreach (range($method['startLine'], $method['endLine']) as $line) {
-                        if (!isset($coverageData[$line]) || $coverageData[$line] === null) {
+                        if (!isset($coverageData[$line])) {
                             continue;
                         }
                         $methodLineElement = $document->createElement('line');
@@ -255,7 +255,7 @@ public function process(CodeCoverage $coverage, ?string $target = null): string
                 $methodElement->appendChild($methodLinesElement);
 
                 foreach (range($function['startLine'], $function['endLine']) as $line) {
-                    if (!isset($coverageData[$line]) || $coverageData[$line] === null) {
+                    if (!isset($coverageData[$line])) {
                         continue;
                     }
                     $methodLineElement = $document->createElement('line');