Merge pull request #69 from rust-lang/oli-obk-patch-1

Update skill_tree.md

Author: RalfJung

src/skill_tree.md

@@ -78,38 +78,16 @@ href = "https://github.com/rust-lang/rust/issues/53020"
 requires = []
 items = []
 
-[[group]]
-name = "unsafe_rules"
-label = "unsafe operations in CTFE"
-href = "https://github.com/rust-lang/rfcs/pull/3016"
-items = []
-
 [[group]]
 name = "unconst_rules"
 label = "unconst operations"
 href = "https://github.com/rust-lang/const-eval/issues/14"
 items = []
-requires = ["unsafe_rules"]
-
-[[group]]
-name = "transmute"
-label = "feature:const_fn_transmute"
-items = []
-requires = ["unsafe_rules"]
-href = "https://github.com/rust-lang/rust/issues/53605"
-
-[[group]]
-name = "union"
-label = "feature:const_fn_union"
-items = []
-requires = ["unsafe_rules"]
-href = "https://github.com/rust-lang/rust/issues/51909"
 
 [[group]]
 name = "raw_ptr_deref"
 label = "feature:const_raw_ptr_deref"
 items = []
-requires = ["unsafe_rules"]
 href = "https://github.com/rust-lang/rust/issues/51911"
 
 [[group]]
@@ -127,7 +105,6 @@ requires = [
 name = "offset"
 label = "offset\nfeature:const_ptr_offset"
 href = "https://github.com/rust-lang/rust/issues/71499"
-requires = ["unsafe_rules"]
 items = []
 
 [[group]]
@@ -148,7 +125,6 @@ label = "MaybeUninit::as_ptr\nfeature:const_maybe_uninit_as_ptr"
 href = "https://github.com/rust-lang/rust/issues/75251"
 items = []
 
-
 [[group]]
 name = "question_mark"
 label = "using ? in const"
@@ -223,18 +199,10 @@ items = []
 [[group]]
 label = "panic! with formatting"
 name = "panic_fmt"
-requires = ["format_args", "panic"]
+requires = ["format_args"]
 href = "https://github.com/rust-lang/rust/issues/51999"
 items = []
 
-[[group]]
-label = "feature:const_panic"
-name = "panic"
-href = "https://github.com/rust-lang/rust/issues/51999"
-items = [
-  { label = "assert!" },
-]
-
 [[group]]
 label = "feature:const_discriminant"
 name = "discriminant"