simplfy

Author: IanButterworth

doc/src/devdocs/pkgimg.md

@@ -36,19 +36,7 @@ To that effect we link with `-undefined dynamic_lookup`.
 
 Similar to [multi-versioning](@ref sysimg-multi-versioning) for system images, package images support multi-versioning. This allows creating package caches that can run efficiently on different CPU architectures within the same environment.
 
-### Usage and constraints
-
-Package images can only target the same or more specific CPU features than their base system image. This constraint ensures compatibility and prevents runtime errors.
-
-To enable multi-versioning for package images, set the [`JULIA_CPU_TARGET`](@ref JULIA_CPU_TARGET) environment variable when building packages:
-
-```bash
-# Create multi-versioned package images for generic and optimized targets
-export JULIA_CPU_TARGET="generic;haswell"
-
-# For heterogeneous environments, use generic to ensure broad compatibility
-export JULIA_CPU_TARGET="generic"
-```
+See the [`JULIA_CPU_TARGET`](@ref JULIA_CPU_TARGET) environment variable for more information on how to set the CPU target for package images.
 
 ## Flags that impact package image creation and selection
 

doc/src/manual/environment-variables.md

@@ -495,18 +495,9 @@ A `generic` or empty CPU name means the basic required feature set of the target
 which is at least the architecture the C/C++ runtime is compiled with. Each string
 is interpreted by LLVM.
 
-#### Examples of valid `JULIA_CPU_TARGET` values
-
-- `generic` - produces portable code for the basic ISA
-- `haswell` - optimizes for Intel Haswell microarchitecture
-- `generic;haswell` - creates multi-versioned images with both generic and optimized variants
-- `x86-64-v3;x86-64-v4` - targets x86-64 microarchitecture levels v3 and v4
-
 !!! note
     Package images can only target the same or more specific CPU features than
-    their base system image. If your system image was built with `JULIA_CPU_TARGET=generic`,
-    package images can use any target. However, if your system image targets a specific CPU
-    (e.g., `haswell`), package images cannot target a less capable CPU.
+    their base system image.
 
 A few special features are supported: