remove need for gcc++ build depends

1 job for master in 4 minutes and 11 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Build
failed #122970
docker linux
Debian

00:04:11

 
Name Stage Failure
failed
Debian Build
dpkg: error processing archive libmyguiengine3debian1v5_3.2.2+dfsg-1_amd64.deb (--install):
subprocess dpkg-deb --control returned error exit status 2
Errors were encountered while processing:
libbullet-dev_2.87+dfsg-2_amd64.deb
libbullet2.87_2.87+dfsg-2_amd64.deb
libmygui-dev_3.2.2+dfsg-1_amd64.deb
libmygui.openglplatform0debian1v5_3.2.2+dfsg-1_amd64.deb
libmyguiengine3debian1v5_3.2.2+dfsg-1_amd64.deb
ERROR: Job failed: exit code 1