[general] Remove the last bits of gnu-efi

With the new bootloader changes that use clang to directly build an EFI
application, the last piece of GNU-EFI that was used (the linker script)
is no longer necessary.

Thanks for being a great starting point, GNU-EFI!

other_software.md

@@ -87,46 +87,3 @@ which is also released under the terms of the MIT license:
 > LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 > OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 > SOFTWARE.
-
-## GNU-EFI
-
-jsix's UEFI bootloader initially used [GNU-EFI][], and still uses one file (the
-linker script for the bootloader) from that project. GNU-EFI claims to be
-released under the BSD license. Again, I could not find its specific license
-file, so I am reproducing a generic 3-clause BSD license (the most restrictive,
-so as not to assume any extra rights that may not actually be granted) for it
-here:
-
-[GNU-EFI]: https://gnu-efi.sourceforge.net
-
-> Copyright (c) Nigel Croxon
-> 
-> Redistribution and use in source and binary forms, with or without
-> modification, are permitted provided that the following conditions are met:
-> 
-> 1. Redistributions of source code must retain the above copyright notice, this
->    list of conditions and the following disclaimer.
-> 
-> 2. Redistributions in binary form must reproduce the above copyright notice,
->    this list of conditions and the following disclaimer in the documentation
->    and/or other materials provided with the distribution.
-> 
-> 3. Neither the name of the copyright holder nor the names of its contributors
->    may be used to endorse or promote products derived from this software
->    without specific prior written permission.
-> 
-> THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
-> ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-> WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-> DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
-> FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-> DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-> SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-> CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
-> OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-> OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-## Intel EFI Application Toolkit
-
-jsix's UEFI loader uses code from Intel's EFI Application toolkit. Relevant
-code includes license statements at the top of each file.