Remove install target for non-existant directory.

--- a/src/CMakeLists.txt	2015-09-13 20:52:28.517344327 +0200
+++ b/src/CMakeLists.txt	2015-09-13 20:53:04.842453987 +0200
@@ -122,12 +122,6 @@
 		DESTINATION
 			${CMAKE_INSTALL_PREFIX}/share/applications
 	)
-	install(
-		FILES
-			${MARS_SOURCE_DIR}/resources/mars
-		DESTINATION
-			${CMAKE_INSTALL_PREFIX}/share/menu
-	)
 
 else(UNIX)
 	# executable
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<tr><td><span title='2020-09-07 19:43:53 +0200'>2020-09-07</span></td><td><a href='/guix/commit/gnu/packages/freeipmi.scm?id=89d0cecceaf7cbdc0ed0dde47a159290d8187eeb'>gnu: freeipmi: Update to 1.6.6.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-05-22 11:00:06 +0300'>2020-05-22</span></td><td><a href='/guix/commit/gnu/packages/freeipmi.scm?id=d8feee9f18ede0d1ea4d0e4876f09a0dab770295'>gnu: freeipmi: Don't build static libraries.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2020-05-22 10:55:09 +0300'>2020-05-22</span></td><td><a href='/guix/commit/gnu/packages/freeipmi.scm?id=0bdfae5363f01a2ad0954ea864ab604c5062fb33'>gnu: freeipmi: Update to 1.6.5.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>