Merge bitcoin/bitcoin#30867: build: Fix ENABLE_WALLET option

0037d53 build: Fix `ENABLE_WALLET` option (Hennadii Stepanov)

Pull request description:

  The removed commands were left over from the transition from autodetection to explicit options in the CMake staging branch. These commands prevented the `-DENABLE_WALLET=OFF` option from being work properly when building with depends.

  How to test:
  ```
  $ make -C depends NO_QT=1
  ```

  On the master branch @ c66c683:
  ```
  $ rm -rf build && cmake -B build --toolchain depends/x86_64-pc-linux-gnu/toolchain.cmake -DENABLE_WALLET=OFF
  < snip >
  Optional features:
    wallet support ...................... ON
     - descriptor wallets (SQLite) ...... ON
     - legacy wallets (Berkeley DB) ..... ON
    external signer ..................... ON
  < snip >
  ```

  With this PR:
  ```
  $ rm -rf build && cmake -B build --toolchain depends/x86_64-pc-linux-gnu/toolchain.cmake -DENABLE_WALLET=OFF
  < snip >
  Optional features:
    wallet support ...................... OFF
    external signer ..................... ON
  < snip >

ACKs for top commit:
  maflcko:
    review ACK 0037d53
  kevkevinpal:
    ACK [0037d53](bitcoin/bitcoin@0037d53)
  pablomartin4btc:
    tACK 0037d53

Tree-SHA512: 0eb14ef104f12a4205172d646c2af820e04514286b5b9a4ceb59c248ce880198dd4051d669098c46c0c0dce069bb60899d90509bbcae65cbeb958e52564fe920

Author: fanquake

CMakeLists.txt

@@ -103,14 +103,12 @@ if(WITH_SQLITE)
     find_package(SQLite3 3.7.17 REQUIRED)
   endif()
   set(USE_SQLITE ON)
-  set(ENABLE_WALLET ON)
 endif()
 option(WITH_BDB "Enable Berkeley DB (BDB) wallet support." OFF)
 cmake_dependent_option(WARN_INCOMPATIBLE_BDB "Warn when using a Berkeley DB (BDB) version other than 4.8." ON "WITH_BDB" OFF)
 if(WITH_BDB)
   find_package(BerkeleyDB 4.8 MODULE REQUIRED)
   set(USE_BDB ON)
-  set(ENABLE_WALLET ON)
   if(NOT BerkeleyDB_VERSION VERSION_EQUAL 4.8)
     message(WARNING "Found Berkeley DB (BDB) other than 4.8.\n"
                     "BDB (legacy) wallets opened by this build will not be portable!"