chore: remove maintainer (#6247)

Signed-off-by: yukke42 <yusuke.muramatsu@tier4.jp>

Author: yukke42

perception/image_projection_based_fusion/package.xml

@@ -5,7 +5,6 @@
   <version>0.1.0</version>
   <description>The image_projection_based_fusion package</description>
   <maintainer email="yukihiro.saito@tier4.jp">Yukihiro Saito</maintainer>
-  <maintainer email="yusuke.muramatsu@tier4.jp">Yusuke Muramatsu</maintainer>
   <maintainer email="shunsuke.miura@tier4.jp">Shunsuke Miura</maintainer>
   <maintainer email="yoshi.ri@tier4.jp">Yoshi Ri</maintainer>
   <maintainer email="dai.nguyen@tier4.jp">badai nguyen</maintainer>