remove unnecessary system check for Unicode output

resolves manrajgrover#5
resolves manrajgrover#25
resolves manrajgrover#141
obsoletes manrajgrover#142

halo/_utils.py

@@ -15,22 +15,6 @@
 init(autoreset=True)
 
 
-def is_supported():
-    """Check whether operating system supports main symbols or not.
-
-    Returns
-    -------
-    boolean
-        Whether operating system supports main symbols or not
-    """
-
-    os_arch = platform.system()
-
-    if os_arch != 'Windows':
-        return True
-
-    return False
-
 
 def get_environment():
     """Get the environment in which halo is running

halo/halo.py

@@ -15,7 +15,7 @@
 from spinners.spinners import Spinners
 
 from halo._utils import (colored_frame, decode_utf_8_text, get_environment,
-                         get_terminal_columns, is_supported, is_text_type,
+                         get_terminal_columns, is_text_type,
                          encode_utf_8_text)
 
 
@@ -308,13 +308,10 @@ def _get_spinner(self, spinner):
         if spinner and type(spinner) == dict:
             return spinner
 
-        if is_supported():
-            if all([is_text_type(spinner), spinner in Spinners.__members__]):
-                return Spinners[spinner].value
-            else:
-                return default_spinner
+        if all([is_text_type(spinner), spinner in Spinners.__members__]):
+            return Spinners[spinner].value
         else:
-            return Spinners['line'].value
+            return default_spinner
 
     def _get_text(self, text):
         """Creates frames based on the selected animation