Remove obsolete Group tag

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

libdap.spec

@@ -4,7 +4,6 @@ Version: 3.19.1
 Release: 2%{?dist}
 
 License: LGPLv2+
-Group: Development/Libraries
 URL: http://www.opendap.org/
 Source0: http://www.opendap.org/pub/source/libdap-%{version}.tar.gz
 #Don't run HTTP tests - builders don't have network connections
@@ -43,7 +42,6 @@ library and demonstrates simple uses of it.
 
 %package devel
 Summary: Development and header files from libdap
-Group: Development/Libraries
 Requires: %{name} = %{version}-%{release}
 Requires: curl-devel
 Requires: libxml2-devel
@@ -58,7 +56,6 @@ will use libdap.
 
 %package doc
 Summary: Documentation of the libdap library
-Group: Documentation
 
 %description doc
 Documentation of the libdap library.