Drop using patchelf out of PATH

New patchelf 0.11 release is out and it has fixes hitting us in both 0.9
and 0.10 on different binaries. So let's simply requiring having
patchelf 0.11 in all cases and be done with it (actually, if not running
4G binaries, using 0.9 is enough).

Related: OS#4389
Change-Id: I2701e46e7710db4c923a68e6b3a2f3c7b126f356
diff --git a/src/osmo_gsm_tester/obj/ms_amarisoft.py b/src/osmo_gsm_tester/obj/ms_amarisoft.py
index b2dc9c7..565786b 100644
--- a/src/osmo_gsm_tester/obj/ms_amarisoft.py
+++ b/src/osmo_gsm_tester/obj/ms_amarisoft.py
@@ -145,7 +145,6 @@
         # setting capabilities will later disable use of LD_LIBRARY_PATH from ELF loader -> modify RPATH instead.
         self.log('Setting RPATH for ltetue')
         # patchelf >= 0.10 is required to support passing several files at once:
-        self.rem_host.set_remote_env({'PATCHELF_BIN': '/opt/bin/patchelf-v0.10' })
         self.rem_host.change_elf_rpath(remote_binary, str(self.remote_inst))
         # We also need to patch the arch-optimized binaries that lteue() will exec() into:
         self.rem_host.change_elf_rpath(self.remote_inst.child('', 'lteue-*'), str(self.remote_inst))
diff --git a/src/osmo_gsm_tester/obj/ms_srs.py b/src/osmo_gsm_tester/obj/ms_srs.py
index 04df1ba..9f77bb6 100644
--- a/src/osmo_gsm_tester/obj/ms_srs.py
+++ b/src/osmo_gsm_tester/obj/ms_srs.py
@@ -176,7 +176,6 @@
         # setting capabilities will later disable use of LD_LIBRARY_PATH from ELF loader -> modify RPATH instead.
         self.log('Setting RPATH for srsue')
         # srsue binary needs patchelf >= 0.9+52 to avoid failing during patch. OS#4389, patchelf-GH#192.
-        self.rem_host.set_remote_env({'PATCHELF_BIN': '/opt/bin/patchelf-v0.10' })
         self.rem_host.change_elf_rpath(remote_binary, remote_lib)
 
         # srsue requires CAP_SYS_ADMIN to jump to net network namespace: netns(CLONE_NEWNET):