depend: do not resolve soname in library path resolution

In `_resolve_library_path_unix` helper, remove the part at the
end where we read the soname of the resolved library and replace
the name in returned path with the soname.

In most cases, this was effectively no-op, because we use this
function to resolve dependencies of binaries that we analyze,
and those refer to those dependencies via their sonames.

However, in the unlikely case that we are trying to resolve a
library with soname that differs from its true (file)name, we
would need to collect it under that true (file)name; first, because
whoever was referring to it expects to find it under the true
(file)name, and second, becase in such case, the file with
corresponding soname might not actually exist at all.

PyInstaller/depend/bindepend.py

@@ -693,18 +693,7 @@ def _resolve_library_path_unix(name):
             paths.append('/usr/local/lib')
         lib = lib_search_func(name, paths)
 
-    # Give up :(
-    if lib is None:
-        return None
-
-    # Resolve the file name into the soname
-    if compat.is_freebsd or compat.is_aix or compat.is_openbsd:
-        # On FreeBSD objdump does not show SONAME, and on AIX objdump does not exist, so we just return the lib we
-        # have found.
-        return lib
-    else:
-        dir = os.path.dirname(lib)
-        return os.path.join(dir, _get_so_name(lib))
+    return lib
 
 
 def _which_library(name, dirs):
@@ -734,22 +723,6 @@ def _library_matcher(name):
     return re.compile(name + r"[0-9]*\.").match
 
 
-def _get_so_name(filename):
-    """
-    Return the soname of a library.
-
-    Soname is useful when there are multiple symplinks to one library.
-    """
-    # TODO verify that objdump works on other unixes and not Linux only.
-    cmd = ["objdump", "-p", filename]
-    pattern = r'\s+SONAME\s+([^\s]+)'
-    if compat.is_solar:
-        cmd = ["elfdump", "-d", filename]
-        pattern = r'\s+SONAME\s+[^\s]+\s+([^\s]+)'
-    m = re.search(pattern, compat.exec_command(*cmd))
-    return m.group(1)
-
-
 #- Python shared library search