Pylint warning and errors clean up

Changes:
    - C0301: Line too long
    - R1705: Unnecessary "elif" after "return", remove
      the leading "el" from "elif"
    - R1710: Either all return statements in a function
      should return an expression, or none of them should.
   - Remove documentation no longer needed

Tested:
   - NA

Change-Id: Ib2bc72b62655bbdd86dd63a349e5da558b222a76
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/lib/pldm_utils.py b/lib/pldm_utils.py
index 81e53fe..f2541f9 100755
--- a/lib/pldm_utils.py
+++ b/lib/pldm_utils.py
@@ -31,14 +31,17 @@
       }
 
     Description of argument(s):
-    option_string                   A string of options which are to be processed by the pldmtool command.
-    parse_results                   Parse the pldmtool results and return a dictionary rather than the raw
-                                    pldmtool output.
-    bsu_options                     Options to be passed directly to bmc_execute_command.  See its prolog for
-                                    details.
+    option_string         A string of options which are to be processed by the
+                          pldmtool command.
+    parse_results         Parse the pldmtool results and return a dictionary
+                          rather than the raw
+                          pldmtool output.
+    bsu_options           Options to be passed directly to bmc_execute_command.
+                          See its prolog for details.
     """
 
-    # This allows callers to specify arguments in python style (e.g. print_out=1 vs. print_out=${1}).
+    # This allows callers to specify arguments in python style
+    # (e.g. print_out=1 vs. print_out=${1}).
     bsu_options = fa.args_to_objects(bsu_options)
 
     stdout, stderr, rc = bsu.bmc_execute_command(
@@ -133,9 +136,11 @@
 
     if attr_type == "BIOSInteger":
         return attr_val_int_dict
-    elif attr_type == "BIOSString":
+    if attr_type == "BIOSString":
         return attr_val_str_dict
 
+    return None
+
 
 def GetRandomBIOSIntAndStrValues(attr_name, count):
     """
@@ -276,7 +281,6 @@
         except ValueError:
             try:
                 # The data values have a double quote in them.
-                # Eg: '"IBM I"' instead of just 'IBM I'
                 data = '"' + str(existing_data[attr]) + '"'
                 temp_list[attr].remove(data)
             except ValueError: