[MVN] Clear deprecated Tycho parameters

fixup! [MVN] Bump Tycho and Maven version for JDK 21 support Related d303e69 Maven bump is manual until Github update there images to have a version of maven above 3.9.X required by Tycho 4 (https://github.com/eclipse-tycho/tycho/blob/tycho-4.0.0/RELEASE_NOTES.md) which is the first version to support JDK 21

gama.parent/pom.xml

@@ -269,7 +269,6 @@
 					<useProjectSettings>false</useProjectSettings>
 					<generatedSourcesDirectory>${project.build.directory}</generatedSourcesDirectory>
 					<optimize>true</optimize>
-					<executionEnvironment>${jdk.version}</executionEnvironment>
 					<showWarnings>true</showWarnings>
 				</configuration>
 			</plugin>
@@ -420,7 +419,6 @@
 							<removeAll />
 						</filter>
 					</filters>
-					<resolver>p2</resolver>
 					<pomDependencies>consider</pomDependencies>
 					<environments>
 						<environment>