Remove obsolete Group tag

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

trousers.spec

@@ -3,7 +3,6 @@ Summary: TCG's Software Stack v1.2
 Version: 0.3.13
 Release: 11%{?dist}
 License: BSD
-Group: System Environment/Libraries
 Url: http://trousers.sourceforge.net
 
 Source0: http://downloads.sourceforge.net/%{name}/%{name}-%{version}.tar.gz
@@ -28,7 +27,6 @@ state using cryptographic hashes and more.
 
 %package lib
 Summary: TrouSerS libtspi library
-Group: Development/Libraries
 # Needed obsoletes due to the -lib subpackage split
 Obsoletes: trousers < 0.3.13-4
 
@@ -37,7 +35,6 @@ The libtspi library for use in Trusted Computing enabled applications.
 
 %package static
 Summary: TrouSerS TCG Device Driver Library
-Group: Development/Libraries
 Requires: %{name}-devel%{?_isa} = %{version}-%{release}
 
 %description static
@@ -48,7 +45,6 @@ https://www.trustedcomputinggroup.org/specs/TSS.
 
 %package devel
 Summary: TrouSerS header files and documentation
-Group: Development/Libraries
 Requires: %{name}-lib%{?_isa} = %{version}-%{release}
 
 %description devel