Revert "Fix trybuild errors for 1.81.0"

This reverts commit 98b3422.

Author: sebcrozet

tests/macros/trybuild/dmatrix_mismatched_dimensions.stderr

@@ -2,4 +2,4 @@ error: Unexpected number of entries in row 1. Expected 3, found 2 entries.
  --> tests/macros/trybuild/dmatrix_mismatched_dimensions.rs:5:13
   |
 5 |             4, 5];
-  |             ^
+  |             ^^^^

tests/macros/trybuild/matrix_mismatched_dimensions.stderr

@@ -2,4 +2,4 @@ error: Unexpected number of entries in row 1. Expected 3, found 2 entries.
  --> tests/macros/trybuild/matrix_mismatched_dimensions.rs:5:13
   |
 5 |             4, 5];
-  |             ^
+  |             ^^^^

tests/macros/trybuild/stack_incompatible_block_dimensions.stderr

@@ -18,15 +18,3 @@ error[E0282]: type annotations needed
    | |____________________^ cannot infer type
    |
    = note: this error originates in the macro `stack` (in Nightly builds, run with -Z macro-backtrace for more info)
-
-error[E0599]: no method named `generic_view_mut` found for struct `Matrix<_, Const<3>, _, _>` in the current scope
-  --> tests/macros/trybuild/stack_incompatible_block_dimensions.rs:11:5
-   |
-11 |       stack![a11, a12;
-   |  _____^
-12 | |            a21, a22];
-   | |____________________^ method not found in `Matrix<_, Const<3>, _, _>`
-   |
-   = note: the method was found for
-           - `Matrix<T, R, C, S>`
-   = note: this error originates in the macro `stack` (in Nightly builds, run with -Z macro-backtrace for more info)

tests/macros/trybuild/stack_incompatible_block_dimensions2.stderr

@@ -18,15 +18,3 @@ error[E0282]: type annotations needed
    | |____________________^ cannot infer type
    |
    = note: this error originates in the macro `stack` (in Nightly builds, run with -Z macro-backtrace for more info)
-
-error[E0599]: no method named `generic_view_mut` found for struct `Matrix<_, _, Const<4>, _>` in the current scope
-  --> tests/macros/trybuild/stack_incompatible_block_dimensions2.rs:12:5
-   |
-12 |       stack![a11, a12;
-   |  _____^
-13 | |            a21, a22];
-   | |____________________^ method not found in `Matrix<_, _, Const<4>, _>`
-   |
-   = note: the method was found for
-           - `Matrix<T, R, C, S>`
-   = note: this error originates in the macro `stack` (in Nightly builds, run with -Z macro-backtrace for more info)