[pom] Raise baseline to jdk8

Author: hazendaz

pom.xml

@@ -75,14 +75,6 @@
   </distributionManagement>
 
   <properties>
-    <maven.compiler.source>1.7</maven.compiler.source>
-    <maven.compiler.target>1.7</maven.compiler.target>
-    <maven.compiler.testTarget>1.7</maven.compiler.testTarget>
-    <maven.compiler.testSource>1.7</maven.compiler.testSource>
-
-    <signature.artifact>java17</signature.artifact>
-    <signature.version>1.0</signature.version>
-
     <clirr.comparisonVersion>1.1.2</clirr.comparisonVersion>
   </properties>