Remove the "weight=10" line from fallback directory mirror entries

This removes some redundant repeated lines.

Ticket 24681 will maintain the current fallback weights by changing
Tor's default fallback weight to 10.

Implements ticket 24679.

changes/ticket24679

@@ -0,0 +1,5 @@
+  o Minor features (fallback directory mirrors):
+    - Remove the "weight=10" line from fallback directory mirror entries.
+      Ticket 24681 will maintain the current fallback weights by changing
+      Tor's default fallback weight to 10.
+      Implements ticket 24679.

scripts/maint/updateFallbackDirs.py

@@ -245,21 +245,6 @@ CONSENSUS_DOWNLOAD_SPEED_MAX = 15.0
 # This avoids delisting a relay due to transient network conditions
 CONSENSUS_DOWNLOAD_RETRY = True
 
-## Fallback Weights for Client Selection
-
-# All fallback weights are equal, and set to the value below
-# Authorities are weighted 1.0 by default
-# Clients use these weights to select fallbacks and authorities at random
-# If there are 100 fallbacks and 9 authorities:
-#  - each fallback is chosen with probability 10.0/(10.0*100 + 1.0*9) ~= 0.99%
-#  - each authority is chosen with probability 1.0/(10.0*100 + 1.0*9) ~= 0.09%
-# A client choosing a bootstrap directory server will choose a fallback for
-# 10.0/(10.0*100 + 1.0*9) * 100 = 99.1% of attempts, and an authority for
-# 1.0/(10.0*100 + 1.0*9) * 9 = 0.9% of attempts.
-# (This disregards the bootstrap schedules, where clients start by choosing
-# from fallbacks & authoritites, then later choose from only authorities.)
-FALLBACK_OUTPUT_WEIGHT = 10.0
-
 ## Parsing Functions
 
 def parse_ts(t):
@@ -1346,7 +1331,7 @@ class Candidate(object):
   def fallbackdir_info(self, dl_speed_ok):
     # "address:dirport orport=port id=fingerprint"
     # "[ipv6=addr:orport]"
-    # "weight=FALLBACK_OUTPUT_WEIGHT",
+    # ,
     #
     # Do we want a C string, or a commented-out string?
     c_string = dl_speed_ok
@@ -1370,7 +1355,7 @@ class Candidate(object):
     if self.has_ipv6():
       s += '" ipv6=%s:%d"'%(cleanse_c_string(self.ipv6addr), self.ipv6orport)
       s += '\n'
-    s += '" weight=%d",'%(FALLBACK_OUTPUT_WEIGHT)
+    s += ','
     if comment_string:
       s += '\n'
       s += '*/'