remove symmetry breaking discussion (moving to a separate PR)

ITP/symmetry-breaking.tex

@@ -130,15 +130,3 @@
 \end{align*}
 This concludes the proof.
 \end{proof}
-
-We had quite some difficulty formalizing the symmetry-breaking argument.
-We spent many hours around a whiteboard,
-simplifying the argument to minimize the amount of theory we would need to develop.
-The projective transformation in Step 3 was particularly difficult to wrangle.
-This step, and those after it, requires careful bookkeeping around the distinguished point $p_1$.
-
-Once these details were worked out,
-the proof was relatively straightforward, albeit long and tedious.
-Each step of the proof justifies not only that a new property is achieved,
-but also that all properties from previous steps are preserved.
-As a result, the proof burden was substantial.