Updates cta.spec.in to use XRootD 4.7.0

cta.spec.in

@@ -16,10 +16,6 @@
 #-------------------------------------
 %define skip_unit_tests @SKIP_UNIT_TESTS@
 
-# Build with XRootD SSI extensions (for developers)
-#--------------------------------------------------
-%define build_xroot_ssi 0@BUILD_XROOT_SSI@
-
 # General settings
 #-----------------
 Summary: CERN Tape Archive
@@ -41,17 +37,10 @@ BuildRequires: xrootd-client-devel = 1:4.2.3
 BuildRequires: xrootd-devel        = 1:4.2.3
 BuildRequires: cryptopp-devel >= 5.6.2
 %else
-%if "%{?build_xroot_ssi}" == "0"
-BuildRequires: xrootd-client-devel  = 1:4.4.1
-BuildRequires: xrootd-devel         = 1:4.4.1
-BuildRequires: xrootd-server-devel  = 1:4.4.1
-BuildRequires: xrootd-private-devel = 1:4.4.1
-%else
 BuildRequires: xrootd-client-devel  = 1:4.7.0
 BuildRequires: xrootd-devel         = 1:4.7.0
 BuildRequires: xrootd-server-devel  = 1:4.7.0
 BuildRequires: xrootd-private-devel = 1:4.7.0
-%endif
 BuildRequires: librados-devel >= 11.0, libradosstriper-devel >= 11.0, 
 BuildRequires: protobuf3-compiler >= 3.3.1 protobuf3-devel >= 3.3.1
 BuildRequires: gmock-devel >= 1.5.0 gtest-devel >= 1.5.0