various ports: remove redundant line

cmake.install_rpath is empty by default now

archivers/libzzip/Portfile

@@ -37,10 +37,8 @@ depends_test-append port:unzip \
 
 # this build links its own library, so => Disable RPATH
 # See: https://github.com/gdraheim/zziplib/issues/121
-cmake.install_rpath
 configure.pre_args-delete \
-    -DCMAKE_BUILD_WITH_INSTALL_RPATH:BOOL=ON \
-    -DCMAKE_INSTALL_RPATH="[join [option cmake.install_rpath] \;]"
+    -DCMAKE_BUILD_WITH_INSTALL_RPATH:BOOL=ON
 
 configure.args-append \
                     -DPYTHON_EXECUTABLE=${prefix}/bin/python${python.branch} \

cross/arm-toolchain-embedded/Portfile

@@ -51,7 +51,6 @@ depends_build-append    path:bin/git:git \
 
 # Install everything under libexec
 cmake.install_prefix    ${sub_prefix}
-cmake.install_rpath
 cmake.generator         Ninja
 cmake.build_type        Release
 

devel/apache-arrow/Portfile

@@ -260,9 +260,6 @@ if {[string match "py*" ${subport}]} {
                     port:py${python.version}-pytest-lazy-fixture \
                     port:py${python.version}-tz
 
-    # the build must link against its own libraries
-    cmake.install_rpath
-
     use_configure   yes
 
     # install apache-arrow for this ${python.branch} in ${configure_destdir}

devel/grpc/Portfile

@@ -98,7 +98,6 @@ if {${build_arch} in [list i386 ppc] && [string match *gcc* ${configure.compiler
 }
 
 # the build must link against its own libraries
-cmake.install_rpath
 configure.pre_args-replace \
                     -DCMAKE_BUILD_WITH_INSTALL_RPATH:BOOL=ON \
                     -DCMAKE_BUILD_WITH_INSTALL_RPATH:BOOL=OFF

lang/clang-11-bootstrap/Portfile

@@ -136,7 +136,6 @@ cmake.generator     {Unix Makefiles}
 # Install everything into libexec
 cmake.install_prefix \
                     ${prefix}/libexec/${name}
-cmake.install_rpath
 
 configure.pre_args-replace \
                     {*}[cmake::system_prefix_path] \

lang/libcxx-powerpc/Portfile

@@ -144,7 +144,6 @@ cmake.generator             {Unix Makefiles}
 
 # As long as the port is explicitly for PowerPC and in single version, we can install into the prefix:
 cmake.install_prefix        ${prefix}/libexec/llvm-${version}
-cmake.install_rpath
 
 configure.pre_args-replace  {*}[cmake::system_prefix_path] \
                             -DCMAKE_SYSTEM_PREFIX_PATH="${cmake.install_prefix}\;/usr"

math/OpenBLAS/Portfile

@@ -180,7 +180,6 @@ configure.pre_args-delete   -DCMAKE_INSTALL_RPATH=${prefix}/lib
 configure.pre_args-replace  -DCMAKE_BUILD_WITH_INSTALL_RPATH:BOOL=ON \
                             -DCMAKE_BUILD_WITH_INSTALL_RPATH:BOOL=OFF
 
-cmake.install_rpath
 compilers.add_gcc_rpath_support no
 
 post-destroot {

science/paraview/Portfile

@@ -81,8 +81,6 @@ compiler.cxx_standard   2011
 qt5.depends_component  sqlite-plugin qttools qtxmlpatterns
 qt5.min_version        5.6
 
-cmake.install_rpath
-
 # paraview sets its own optimization flags
 configure.optflags