diff --git a/ebook_converter/constants_old.py b/ebook_converter/constants_old.py
index 570248c..d635578 100644
--- a/ebook_converter/constants_old.py
+++ b/ebook_converter/constants_old.py
@@ -36,10 +36,6 @@ if iswindows:
     isxp = wver.major < 6
     isoldvista = wver.build < 6002
 is64bit = sys.maxsize > (1 << 32)
-isworker = any([os.getenv('CALIBRE_WORKER') or
-                os.getenv('CALIBRE_SIMPLE_WORKER')])
-if isworker:
-    os.environ.pop('CALIBRE_FORCE_ANSI', None)
 FAKE_PROTOCOL, FAKE_HOST = 'clbr', 'internal.invalid'
 VIEWER_APP_UID = 'com.calibre-ebook.viewer'
 EDITOR_APP_UID = 'com.calibre-ebook.edit-book'
diff --git a/ebook_converter/utils/fonts/scanner.py b/ebook_converter/utils/fonts/scanner.py
index d87faf0..2c1a6b4 100644
--- a/ebook_converter/utils/fonts/scanner.py
+++ b/ebook_converter/utils/fonts/scanner.py
@@ -4,7 +4,7 @@ from threading import Thread
 
 from ebook_converter import walk, prints
 from ebook_converter.constants_old import iswindows, isosx
-from ebook_converter.constants_old import plugins, DEBUG, isworker
+from ebook_converter.constants_old import plugins, DEBUG
 from ebook_converter.constants_old import filesystem_encoding
 from ebook_converter.utils.fonts.metadata import FontMetadata, UnsupportedFont
 
@@ -308,14 +308,6 @@ class FontScanner(Thread):
 
     def do_scan(self):
         self.reload_cache()
-
-        if isworker:
-            # Dont scan font files in worker processes, use whatever is
-            # cached. Font files typically dont change frequently enough to
-            # justify a rescan in a worker process.
-            self.build_families()
-            return
-
         cached_fonts = self.cached_fonts.copy()
         self.cached_fonts.clear()
         for folder in self.folders:
diff --git a/ebook_converter/utils/terminal.py b/ebook_converter/utils/terminal.py
index 302d31f..6de8cd4 100644
--- a/ebook_converter/utils/terminal.py
+++ b/ebook_converter/utils/terminal.py
@@ -100,9 +100,10 @@ def colored(text, fg=None, bg=None, bold=False):
 class Detect(object):
 
     def __init__(self, stream):
+        __import__('pdb').set_trace()
         self.stream = stream or sys.stdout
         self.isatty = getattr(self.stream, 'isatty', lambda : False)()
-        force_ansi = 'CALIBRE_FORCE_ANSI' in os.environ
+        force_ansi = False
         if not self.isatty and force_ansi:
             self.isatty = True
         self.isansi = force_ansi or not iswindows