Removes pitest as a maven plugin

It is used for mutation testing but realistically we don't even write that many tests.
Just adds complexity and because it is not often used, causes trouble when it hasn't been touched for months/years

Core/pom.xml

@@ -134,6 +134,7 @@
             <scope>provided</scope>
         </dependency>
 
+        <!--suppress VulnerableLibrariesLocal -->
         <dependency>
             <groupId>${project.groupId}</groupId>
             <artifactId>SongodaCore-Compatibility</artifactId>

NMS/NMS-v1_20_R1/pom.xml

@@ -71,6 +71,7 @@
             <scope>provided</scope>
         </dependency>
 
+        <!--suppress VulnerableLibrariesLocal -->
         <dependency>
             <groupId>${project.groupId}</groupId>
             <artifactId>SongodaCore-NMS-API</artifactId>

pom.xml

@@ -118,30 +118,6 @@
                     </execution>
                 </executions>
             </plugin>
-
-            <plugin>
-                <groupId>org.pitest</groupId>
-                <artifactId>pitest-maven</artifactId>
-                <version>1.10.3</version>
-
-                <configuration>
-                    <targetClasses>
-                        <param>com.songoda.core.*</param>
-                    </targetClasses>
-
-                    <excludedTestClasses>
-                        <excludedTestClass>com.craftaro.core.SongodaCoreConstantsTest</excludedTestClass>
-                    </excludedTestClasses>
-                </configuration>
-
-                <dependencies>
-                    <dependency>
-                        <groupId>org.pitest</groupId>
-                        <artifactId>pitest-junit5-plugin</artifactId>
-                        <version>1.1.0</version>
-                    </dependency>
-                </dependencies>
-            </plugin>
         </plugins>
     </build>