Remove seemingly unused debugging.py.

Add in https://github.com/galaxyproject/galaxy/commit/017a3c356b8742dd09e65f1c6ce86c0afd7de3b4.

lib/galaxy/util/debugging.py

@@ -1,68 +0,0 @@
-
-import inspect
-import time
-
-import logging
-log = logging.getLogger( __name__ )
-
-
-def stack_trace_string( max_depth=None, line_format="{index}:{file}:{function}:{line}" ):
-    """
-    Returns a string representation of the current stack.
-
-    :param depth: positive integer to control how many levels of the stack are
-    returned. max_depth=None returns the entire stack (default).
-    """
-    stack_list = []
-    for index, caller in enumerate( inspect.stack() ):
-        # don't include this function
-        if index == 0:
-            continue
-        if max_depth and index > max_depth:
-            break
-
-        caller_data = {
-            'index'     : str( index ),
-            'file'      : caller[1],
-            'function'  : caller[3],
-            'line'      : caller[2]
-        }
-        stack_list.append( line_format.format( **caller_data ) )
-
-    return '\n'.join( stack_list )
-
-
-class SimpleProfiler( object ):
-    """
-    Simple profiler that captures the duration between calls to `report`
-    and stores the results in a list.
-    """
-    REPORT_FORMAT = '%20f: %s'
-
-    def __init__( self, log=None ):
-        self.log = log
-        self.start_time = 0
-        self.reports = []
-
-    def start( self, msg=None ):
-        msg = msg or 'Start'
-        self.start_time = time.time()
-        report = self.REPORT_FORMAT % ( self.start_time, msg )
-        self.reports.append( report )
-        if self.log:
-            self.log( report )
-
-    def report( self, msg ):
-        if not self.start_time:
-            self.start()
-        duration = time.time() - self.start_time
-        report = self.REPORT_FORMAT % ( duration, msg )
-        self.reports.append( report )
-        if self.log:
-            self.log( report )
-
-    def get_reports( self ):
-        return self.reports
-
-    def __str__( self ):
-        return '\n'.join( self.reports )