Always wanted to make this deck or a wall deck. Nicely done

You have way too many cards there, man. Commander has a 100 card minimum AND maximum.

I know, which is why I said, in the description, that I need help figuring out what to remove to make it EDH legal. Hence the "need help" red cross beside the name

I would keep most of the creatures and focus on taking out artifacts/instants/sorceries. You can get away with running a bit less land too.

Suggestions on what to remove?

Well I guess it depends on if you want to stay creature heavy or cut out half of them and keep support spells. I like creature decks so I would say cut a lot of support but keep mana ramp and drawing cards if possible. With all that toughness you will be pretty sturdy and don't need creature buffs as much either. Things like privileged position are nice but don't go overboard.

Oh, easy way to cut cards: decide on what you want your theme/wincon is and cuz anything and everything that doesn't advance one of those agendas.

Maelstrom pulse isnt as useful in EDH as it is everywhere else. you can do better than 3cmc spot removal

Slagwurm Armor is pretty great. Just an equipment with a +6/+6 buff for a mere 4 colorless mana.

Treefolk Harbinger is a strong 1-drop tutor that also has a high toughness.

Silklash Spider does an incredible job of protecting you from fliers, plus it's effectively a 7/7 to boot.

Oathsworn Giant gives your entire team a massive anthem boost and vigilance, which is a really relevant ability given all your high toughness creatures.

Putrefy and Mortify are efficient, relevant spot removal. Definitely should include.

Behind the Scenes is interesting since most of your creatures have low power and skulk will make them unblockable, but Doran then assigns high damage afterwards. It also pumps your creatures in a pinch.

Cultivate and Kodama's Reach should be included to help fix your mana base; very necessary in a 3-or-more-color decklist.

Bosk Banneret ensures your high-power (or should I say, toughness) Treefolk will hit the board sooner.

Spidersilk Armor is another anthem effect with Doran, plus it gives you another way to counter fliers.

Nyx-Fleece Ram has a high toughness-to-cost ratio and buffers your life a little bit.

Deadwood Treefolk gives you a small amount of recursion, which is always useful and powerful.

Austin_Smith_of_Cards I had all of those cards in the deck before, I sadly had to cut them due to limited space. Any cards that could be removed to give these cards space?

I would remove the following cards:

You don't have that many lifegain cards in your decklist, so you can't take full advantage of Rhox Faithmender.

Kami of Old Stone is too vanilla and can be replaced by something better. Strictly worse than Indomitable Ancients anyway.

Wall of Nets is usually going to kill things before it exiles them, so it's actually weaker in a deck with Doran.

Ayli, Eternal Pilgrim is good, but not good enough. She's better in a lifegain deck than in a deck with high-toughness creatures, even though she synergises somewhat.

Tasseled Dromedary is too vanilla and doesn't do enough; Treefolk Harbinger is the better card.

Jaddi Lifestrider weakens your boardstate in order to make its ability useful, and usually having giant blockers is better than some lifegain.

Tangle Angler is good, but the decklist isn't infect, which means it's less efficient here.

Grim Contest can be swapped out for one of the better removal spells.

Return to Dust is outclassed since you have access to Sylvan Reclamation, and Mortify and Putrefy also can destroy artifacts/enchantments.

Seasons Past is a tough pick to remove, but most of your creatures should be sticking around on the battlefield anyway.

You have a lot of great boardwipe tools that compliment your decklist, so I think Wrath of God can go.

Belbe's Armor is a great topdeck mana sink, but unimpressive otherwise.

Abzan Banner is the most expensive out of all your mana rocks; it can probably go.