application: do not try to install imagej-launcher-*.jar

Currently, mvn -Dapp fails with something like:

    [INFO] --- maven-assembly-plugin:3.2.0:single (make-assembly) @ imagej ---
    [INFO] Reading assembly descriptor: src/main/assembly/zip.xml
    [WARNING] The assembly descriptor contains a *nix-specific root-relative reference (starting with slash). This is not portable and might fail on Windows: /Contents/Resources/
    [WARNING] The assembly descriptor contains a *nix-specific root-relative reference (starting with slash). This is not portable and might fail on Windows: /images/
    [WARNING] The assembly descriptor contains a *nix-specific root-relative reference (starting with slash). This is not portable and might fail on Windows: /images/
    [INFO] ------------------------------------------------------------------------
    [INFO] BUILD FAILURE
    [INFO] ------------------------------------------------------------------------
    [INFO] Total time:  15.826 s
    [INFO] Finished at: 2021-09-10T13:43:20+02:00
    [INFO] ------------------------------------------------------------------------
    [ERROR] Failed to execute goal org.apache.maven.plugins:maven-assembly-plugin:3.2.0:single (make-assembly) on project imagej: Failed to create assembly: Error adding file to archive: /home/grimler/imagej2/src/imagej2-imagej-2.2.0/target/imagej-launcher-6.0.1.jar -> [Help 1]
    [ERROR]
    [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
    [ERROR] Re-run Maven using the -X switch to enable full debug logging.
    [ERROR]
    [ERROR] For more information about the errors and possible solutions, please read the following articles:
    [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

The same error (I think) was fixed for pom.xml in c3562b1 ("Fix
imagej-launcher dependency").

Fixes #293.

Signed-off-by: Curtis Rueden <[email protected]>

pom.xml

@@ -124,6 +124,10 @@
 			<url>https://imagej.net/people/tferr</url>
 			<properties><id>tferr</id></properties>
 		</contributor>
+		<contributor>
+			<name>Henrik Grimler</name>
+			<properties><id>Grimler91</id></properties>
+		</contributor>
 		<contributor>
 			<name>Aivar Grislis</name>
 			<url>https://imagej.net/people/grislis</url>

src/main/assembly/application.xml

@@ -84,11 +84,6 @@
 		</file>
 
 		<!-- Include the ImageJ launcher executables in appropriate locations. -->
-		<file>
-			<source>target/imagej-launcher-${imagej-launcher.version}.jar</source>
-			<outputDirectory>jars/</outputDirectory>
-			<destName>imagej-launcher-${imagej-launcher.version}.jar</destName>
-		</file>
 		<file>
 			<source>target/imagej-launcher-linux64</source>
 			<destName>ImageJ-linux64</destName>