Remove holder.js references from syntax-highlighted example HTML

BS3 commits: fa08c932cd72448a42eb3b2283478c39bffc0373
Remove 14972's entry from Wall of Browser bugs

BS3 commits: bb9118f03a00b33f9859319d1237cdf13ae3ee4d
Remove reference to old fixed WebKit bug in Less comment.

BS3 commits: f2a0a78b179d3730c9e49e661ff0d6d87e67f58f
Reference iOS Safari temporal input bug in explanatory Less comment

BS3 commits: e5051e76feaeafb0b999b0b2662f0c2669c48d10
Fixes 15422: Alternate fix for temporal input sizing in input groups

BS3 commits: c41970c5797cd1c3b61a5396031a3258c9c07705
grunt. grunt

BS3 commits: c4a23cc04063443a8f02c5451c3d30a81728caba,
977646d7a0cfd3453fb716af1bc0d458e2b0fd5d
automatic grunt dist. grunt

BS3 commits: 3668bde098e1bce289ba313119fe3cf05d01825b,
977646d7a0cfd3453fb716af1bc0d458e2b0fd5d
grunt. Fixes 15422: Alternate fix for temporal input sizing in input groups. grunt

BS3 commits: c4a23cc04063443a8f02c5451c3d30a81728caba,
c41970c5797cd1c3b61a5396031a3258c9c07705,
977646d7a0cfd3453fb716af1bc0d458e2b0fd5d