imath: add v3.1.11, drop old versions

[valgur]

AcademySoftwareFoundation/Imath@v3.1.10...v3.1.11

It's virtually identical to v3.1.10 on CCI due to the bugfix in this relase being backported here.

[github-actions]

🤖 Beep Boop! This pull request is making changes to 'recipes/imath//'.

👋 @irieger you might be interested. 😉

[conan-center-bot]

Conan v1 pipeline ✔️

All green in build 1 (9ed987b10d314ec10697d525c0c6ad1842f5f0d7):

• imath/3.1.11:
  All packages built successfully! (All logs)

---

Conan v2 pipeline ✔️

Note: Conan v2 builds are now mandatory. Please read our discussion about it.

All green in build 1 (9ed987b10d314ec10697d525c0c6ad1842f5f0d7):

• imath/3.1.11:
  All packages built successfully! (All logs)

[github-actions]

Hooks produced the following warnings for commit 9ed987b

imath/3.1.11@#cf904c9a51fc4c24f4cae114e7809162

post_package(): WARN: [MISSING SYSTEM LIBS (KB-H043)] Library './lib/libImath-3_1.so' links to system library 'm' but it is not in cpp_info.system_libs.
post_package(): WARN: [MISSING SYSTEM LIBS (KB-H043)] Library './lib/libImath.so' links to system library 'm' but it is not in cpp_info.system_libs.
post_package(): WARN: [MISSING SYSTEM LIBS (KB-H043)] Library './lib/libImath-3_1_d.so' links to system library 'm' but it is not in cpp_info.system_libs.
post_package(): WARN: [MISSING SYSTEM LIBS (KB-H043)] Library './lib/libImath_d.so' links to system library 'm' but it is not in cpp_info.system_libs.

[AbrilRBS]

Thanks!