Remove obsolete Group tag

References: https://fedoraproject.org/wiki/Changes/Remove_Group_Tag

cfitsio.spec

@@ -29,7 +29,6 @@ most widely used FITS file programming interface in the astronomical
 community.
 
 %package devel
-Group:  Development/Libraries
 Summary: Headers required when building programs against cfitsio
 Requires: %{name} = %{version}-%{release}
 Requires: pkgconfig
@@ -38,7 +37,6 @@ Requires: pkgconfig
 Headers required when building a program against the cfitsio library.
 
 %package static
-Group: Development/Libraries
 Summary: Static cfitsio library
 
 %description static
@@ -46,7 +44,6 @@ Static cfitsio library; avoid use if possible.
 
 %package docs
 Summary: Documentation for cfitsio
-Group:  Development/Libraries
 BuildArch:  noarch
 
 %description docs
@@ -54,7 +51,6 @@ Stand-alone documentation for cfitsio.
 
 %package -n fpack
 Summary: FITS image compression and decompression utilities
-Group: Applications/Engineering
 Requires: %{name} = %{version}-%{release}
 
 %description -n fpack