Remove unneeded grammar links

Now that mdbook-spec auto-generates link definitions for grammar names,
there's no need to be explicit about these.

Author: ehuss

src/expressions/if-expr.md

@@ -35,7 +35,7 @@ The syntax of an `if` expression is a sequence of one or more condition operands
 followed by a consequent block, any number of `else if` conditions and blocks, and an optional trailing `else` block.
 
 r[expr.if.condition]
-Condition operands must be either an [_Expression_] with a [boolean type] or a conditional `let` match.
+Condition operands must be either an [Expression] with a [boolean type] or a conditional `let` match.
 
 r[expr.if.condition-true]
 If all of the condition operands evaluate to `true` and all of the `let` patterns successfully match their [scrutinee]s,
@@ -178,10 +178,6 @@ r[expr.if.edition2024]
 > [!EDITION-2024]
 > Before the 2024 edition, let chains are not supported. That is, the [LetChain] grammar is not allowed in an `if` expression.
 
-[_BlockExpression_]: block-expr.md
-[_Expression_]: ../expressions.md
-[_Pattern_]: ../patterns.md
-[_Scrutinee_]: match-expr.md
 [`match` expressions]: match-expr.md
 [boolean type]: ../types/boolean.md
 [scrutinee]: ../glossary.md#scrutinee

src/expressions/loop-expr.md

@@ -60,10 +60,10 @@ A `while` loop expression allows repeating the evaluation of a block while a set
 
 r[expr.loop.while.syntax]
 The syntax of a `while` expression is a sequence of one or more condition operands separated by `&&`,
-followed by a [_BlockExpression_].
+followed by a [BlockExpression].
 
 r[expr.loop.while.condition]
-Condition operands must be either an [_Expression_] with a [boolean type] or a conditional `let` match.
+Condition operands must be either an [Expression] with a [boolean type] or a conditional `let` match.
 If all of the condition operands evaluate to `true` and all of the `let` patterns successfully match their [scrutinee]s,
 then the loop body block executes.
 
@@ -392,8 +392,6 @@ r[expr.loop.break-value.loop]
 In the case a `loop` has an associated `break`, it is not considered diverging, and the `loop` must have a type compatible with each `break` expression.
 `break` without an expression is considered identical to `break` with expression `()`.
 
-[_BlockExpression_]: block-expr.md
-[_Expression_]: ../expressions.md
 [`if` condition chains]: if-expr.md#chains-of-conditions
 [`if` expressions]: if-expr.md
 [`match` expression]: match-expr.md